Emergency-brake.



No. 665,225. 7 Patented lgn. new.

G. JOHN. mEnaEncY BRAKE.

(Application filed Nov. 29; 1897.) (No Model.) 3 Sheets-Shae Witneoam ms NORRIS perms ca; pnomurna, wnsnma mu. 0, c

no. 665,225. Patented m; I, lam.

1;. mm. EMERGENCY BRAKE.

I (Application filed Nov. 29, 1897.,

(No Model.) 3 Shad -Sheet 2 Witnesses mz NORRIS urns 0a., Pnqro-umm. wumnamn. n, c.

Patented Ian. I

I 3 m m m m G JOHN EMERGENCY BRAKE. (Application. filed Nov 2?, 1897.)

- 3 Shebts I (No Model.)

.... 4, Ir Q. w WNI I.I.--:..,. R Na III H 1 n I E ll -Illvs JMMPLMMH HI; 111 NJ at Yonkers, in the county of We'stc'hester and grips and lock them again- -at'wil1, thus en- I it .in the drawings in connection with one of GRIFFITH JOHN, 0E YONKERS, NEW vonicns'sieuon, BY MEsNE ASSIGNQ .MENTS, TO THE OTIS ELEVATOR JERSEY.

PATENT QF ICE;

COMPANY, OF "EAST ORANGE, NEW

EM ERGENCY-B'RAKE.

SPECIFICATION forming part of Letters Patent 0. 665,225, dated. January 1, 1901 v Application filed November 29, 1897. serial No. 660,101. (No model.) 7

To all whom, it may concern:

Be it known that I, GRIFFITH JOHN, a subject of the Queen of Great Britain, residing State of New'York, have invented certain new and usefullmprovements in Emergency- Brakes, of which the fellowingis-a specification.

Elevator apparatus have from time to time been supplied with automatic safety brakes or devices of various different constructions, some of which have proved to be exceedingly efficient, so that serious accidents Where such devices have been employed are almost unknown. It is desirable, however, to prevent, the conditions under which such devices come into action. I g I The well known automatic devices for throwing in the safeties are dependent upon. the velocity at which the carftravels, andas the ordinary running speed of elevators in the modern ofiice buildings is so great it is-desirable that some device'should be madefiq'o en,- able the operator in the cage, in case of any derangement of the machinery or from other causes, to lock the cage to the guides'before the speed of the car attains sufficient velocity to throw in the automatic devices, and it is also desirable that these devices be of such construction that the operatorcan release the abling the operator tobring the car'to the landing, so as to discharge the passengers, thereby preventing the destruction of the inclosure or the car and relieving the passengers from an annoying and disagreeable position.

Myinvention consists'inimeans for securing said results, v

In the accompanying drawings, .rigure 1 illustratesiin elevation 'sufficient .of an elevator apparatus to show one means of carrying out my invention. Fig. 2 is a sectional plan of the cage inverted with the-parts illustrated in Fig. 1'. Fig. 3 is an enlarged longitudinal section of part of the braking devices, and Fig. 4 is a plan of Fig. 3'.

While my improvement may be carried out in connection with automatic safety devices of difierent constructions, I have illustrated at w and caused to bite the guide byythe sepa' -is weighted to keep the cable 0 taut.- The" (lrum I is connected to the two pairs of togthe most effective constructions nowin pracabove the roofer, as shown, may be beneath the bottom of the carA. There are twobrakes;

M M, one for gripping each of the guides 'X,

and each consisting of two jaws 3 '3, pivoted ration of their inner ends on the straightem ing of toggles g, as results if the suspensionc'ables break or are slackened andjthe car descends by gravity too rapidly. v f I There is a drum I, around which is wound a cable 0, passing around a pulley5 and connected to an endless cable 0 which passes at the top around a pulley F of a governor and at the bottom around a pulley F, which 'gles through the medium of shafts 'JJ, each 7 of which is reversely threaded at -opposite, ends, one end extending into the threaded socket of a box 6, connected with the toggle g, and the other into the threaded socket of a box 7 upon a threaded shaft J carried bythedrumLf H So far as the general arrangement above described is concerned, the construction and operat-ion do not materiallyidiffer from that set forth in the patent tofA. G. Ellithorpe,-No. 376,374,dated January10,l888. A sintheape parat-us in the Ellithorpe patent, any undue speed of the cage will throw out the governorballs, arrest the movement of the cable 0',

shaft J is so mounted that it can'be turned;

independently upon itsaxis whether the drum I is in motion or not, and the rotation of the shafts with reverse threads at the opposite ends will serve as a means of separating or bringing together the lpxes 6 7.and of apply-.-

ing or loosening the brakes. Different means" may be employed for rotating th'ef'shafts J; 1065 from within the cage by the operator. I Preferably both shafts should be turned together s I and drawing upon the cable 0 will rotate the. w v drum audits boxes, thrust outward the'rod'm 7 I I swinging the lever turn the shafts J, and

thereby quickly thrust the latter outward longitudinally and-apply the brakes, and-thereafter by a reverse movement of the lever.re-

lease them.. It will be'evidentthat while the brakes may thus be quickly applied they are not caused to grasp the guides so suddenly than a continued movement.

as to bring the cage to an instant stop, which would be more destructive in many instances The operating device within the cage is preferably in the form of a lever adapted to beoperated by hand to either apply or release the brakes positively, as may be required; but in some instances the operating device may be arranged-t0 be operated by the foot.

Without limiting myself tothe precise construction and arrangement shown, I claim as my in,vention 1. In an elevator-car brake, the combination of a car, a suspension-cable therefor, braking device, automatic operating devices therefor-independent of the suspension-cable, and an operating device within the car whereby the operator can operate the braking device to positively apply or release the latter to regulate the speed or arrest the motion indrum, and

dependently of the automatic devices, substantially as described. 1

2. In an elevator-car brake, the combination with the car,its suspension-cablemlam ps, operating-shaft, and automatic operating devices independent of the suspension-cable, of an operating device within the car, and connections between the latter and said shaft, whereby the operator can positively apply or. release said clamps independently of the automatic devices, substantially as'described.

3. In an elevator-car brake, the combination with the clamps, toggles,"thrcaded operating-shafts, drum, and means for automatically operating the drum, of an operating-- lever within the car, and connections between the lever and said shafts whereby the operator may turn the shafts independently of the drum to positively apply -or release the clamps, substantially as described.

4, In an elevator-car brake, the combination with the clamps, toggles, threaded shafts, boxes 6 and 7 connecting the shafts, of automatic actuating devices and a pivoted operating-lever within the car, arms Witnesses:

W. E. HODGMAN, J. SUTTZER. 

